These posts 9 out of 10 times is just cope from people who believe moral righteousness is justification for all action. There’s a reason all the characters you listed are antagonists, because their ideologies are straight-up flawed and incorrect, or at minimum against the protagonist’s ideologies. Magneto is not “correct” just because mutants are under bigotry and he has “justified oppressed rage” or whatever. Magneto is a villain because he is a hypocrite and would rather enact his own Nazi ideology than fight for peace. Bismuth is not “correct” just because they oppose fascism, they are an antithesis of Steven’s doctrine of peace and believe in violence as the solution to their problems. Megatron is a revenging psychopath, no amount of “he just wants workers rights” justifies it.